Chromogenic dihydroquinazolines

Details Chromogenic dihydroquinazolines Chromogenic dihydroquinazolines

1983-04-18

1985-03-05

Ford, John M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544 80, 544115, 544247, C07D40314, C07D40310, C07D40304, C07D23974

Patent

active

045032270

ABSTRACT:
The invention relates to chromogenic dihydroquinazolines of the general formula ##STR1## wherein the ring A is a monocyclic or polycyclic, unsubstituted or substituted heterocyclic radical which may contain further heteroatoms as ring members,

REFERENCES:
patent: 4183932 (1980-01-01), Yamamoto et al.

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